Revert "drm/amd/display: update DML2 policy EnhancedPrefetchScheduleAccelerationFinal...

This reverts
commit 9dad21f910fc ("drm/amd/display: update DML2 policy EnhancedPrefetchScheduleAccelerationFinal DCN35")

[why & how]
The offending commit exposes a hang with lid close/open behavior.
Both issues seem to be related to ODM 2:1 mode switching, so there
is another issue generic to that sequence that needs to be
investigated.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Ovidiu Bunea <Ovidiu.Bunea@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 68bf95317ebf2cfa7105251e4279e951daceefb7)
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml2_policy.c b/drivers/gpu/drm/amd/display/dc/dml2/dml2_policy.c
index 11c904ae29586d8b6b179a4011894bb58d6dcc8b..c4c52173ef2240d181fef8309891cc921535fc4e 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dml2/dml2_policy.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2/dml2_policy.c
@@ -303,6 +303,7 @@ void build_unoptimized_policy_settings(enum dml_project_id project, struct dml_m
        if (project == dml_project_dcn35 ||
                project == dml_project_dcn351) {
                policy->DCCProgrammingAssumesScanDirectionUnknownFinal = false;
+               policy->EnhancedPrefetchScheduleAccelerationFinal = 0;
                policy->AllowForPStateChangeOrStutterInVBlankFinal = dml_prefetch_support_uclk_fclk_and_stutter_if_possible; /*new*/
                policy->UseOnlyMaxPrefetchModes = 1;
        }